Officers saw what they believed to be drug transactions taking place at 5:45 p.m. near 75 Boylston St.

John Manwaring, 42, of Maitland, Florida, who told officers he was a pilot, was arrested and charged with possession of heroin. Police said he told officers he had arrived in Boston a few hours before.

"The crewmember in question was removed from duty last night pending the outcome of this investigation. In compliance with all FAA and DOT regulations and requirements, JetBlue has in place a rigorous drug testing program for crewmembers," JetBlue said in a statement.

A woman Manwaring was with, Jennifer Robinson, 31, of Boston, was charged with possession of heroin.

Braulio Valentin, 34, of Worcester, was charged with trespassing and distribution of heroin, Pedro Davila, 36, of Boston was charged with distribution of heroin and possession of cocaine, Gerado Puchales, 26, of Boston, was charged with trespassing, and Abraham Ayala-Garcia, 31, of Boston, was charged with trespassing.

They are scheduled to face charges later Monday in Boston Municipal Court, police said.